User 82021

look up lexus tsb SU001-01. it is to change the 48655 bushing in the above picture. it has to do with steering wheel flutter at highway speeds. my 01 LS430 did the same thing until i changed those bushings. sometimes it would be ok and sometimes it wouldnt.

Lynzoid

THANKS ! This looks very interesting. Ordering these now.
(ball joint job was aborted today, service station is packed).

User 82021

did you get my PM with the updated part number?

Lynzoid

Yes, and actually they updated it again to
48655–50012 and i ordered 2 already !
Do you by any chance have full TSB pdf ??? Would love to read thru it.
Thanks again, worth a try.

Lynzoid

Anyone have access to TSB's (alldata or whatever) ?
Can someone obtain for me copy of SU001-01 TSB please ?
Would make an interesting reading while i wait for the bushings.
Thanks

StanVanDam

SU001-01 says Lower Arm No. 2 Bushing has been changed, previous part # 48655-50010, new part # 48655-50011.

Flowchart says to balance the tires (I would recommend using a Hunter GSP9700 Roadforce balancer), and if that doesn't help, then replace the Lower Arm # 2 bushings and perform a wheel alignment after.

Special Service Tool 09710-03130-02 Lower Arm # 2 Bushing Removal Tool should be used instead of the older SST 09613-26010 and SST 09951-00650.

Applies to 2001 LS430s only, VIN JTHBN30F#10015000, covered under Basic Warranty (48 months of in-service date or 50000 miles, whichever comes first).

Lynzoid

Thanks, great info !
Can you post the 'intro' section text in full ? It'd be interesting to see what kind of customer complaint or how they describe it in detail...
If there isn't anything more there - thanks anyway for your help !

add: hmm my vin is JTHBN30F40005xxxx... But EPC shows that old part no. as being assembled into the vehicle... Well, replacing these with new ones won't hurt !

StanVanDam

The intro section says: "To reduce steering flutter at highway speeds, the front suspension Lower Arm No. 2 Bushing has been changed."

That's all there is, hope this helps.

Bon

I wonder what the SST is used for? I removed the arm with ordinary tools and took it to a shop that pressed out the old bushings and pressed in the new again with an ordinary shop press. $20.

Lynzoid

Thanks for all help ! Already having a kind of placebo effect - car drives much better

Lynzoid

Ok, reviving this thread.
Only today i installed new bushings and ball joints (front lower).
Before that car drove relatively fine, with still intermittent wobble but slightly less pronounced after i replaced the stab bushings.
Ok, i didn't do alignment yet (in cpl of hrs) but i already feel that car is more stiff and quiet.
Also, these big bushings (front lower n.2) are very complex inside !!! These have inside: oil, some kind of valves, some king of fluid channels, lots of shiny metal. So it's NOT just rubber bushings ! So you cannot judge it by just looking from outside...
Work itself was fine without toyota SST's - just usual hydro.press and set of tools. Took about 1 hr all in all.

Going to report about final outcome later today.
Thanks all

Lynzoid

Done alignment and drove for a day. I say it's FIXED !
Finally. Car rides 'showroom'.

User 82021

glad to hear it

Lynzoid

Well, the saga didn't stop there guys....
I am quite relaxed at this very moment, cos i FINALLY KNOW WHY it all happened... But same time yesterday i was ready to sell the car as-is...
Why ? Yesterday i had my brakes worked on (pads+shims+grease) and after i put wheels back on (torque wrench and all) i had everything coming back - hellish wobble etcetcetc... Also when braking it amplified - all as usual BEFORE 'fix'.
OMG, i was pssd....
But one thing caught my attention:
one of the left front wheel's nuts was sitting DEEPER than all other nuts on this wheel by like 1/4in in torqued state. Also, same nut was giving feeling of 'soft tight' - i thought it to be a near-pulled stud... How wrong was i..
Ok, today i took wheel off (left front) and started to THINK.
First, i noticed that on the surface of brake rotor, around bolt holes, there was uneven round depressions in metal of rotor. Nothing like this on right front rotor.
Hmm, i thought.
Then, i compared all the lugnuts. All equal.
Then, i took one and.... started to put it sequentially to holes in the wheel.
1st - sitting nice.. 2nd - same... 3rd - ok..
4TH !!!!! When i put nut in there, the 'open' end of the nut was PROTRUDING BEYOND the back plane of the wheel about...1/4in !!!!!!
So, basically, somehow, one of the holes in the wheel (r17 alloys from GS400h), was 'thinner' than four others !!!
So, basically, each time wheel was taken off and put back on, another hole on rotor was being ruined !!!!!!! Darn.
This is the stuff i never even heard of happening. On any car.
So, i took one spare lugnut, and using chisel took the washer off it and put it on to one of the wheel nuts as 'second washer'. I hope you guys with me =) I hate to say i didnt take any pics, but i guess it's comprehend-able without ones.
So, i try this 'thick washered nut' on this 'deep' hole - fits ideally, open end sits mm from the mounting surface.
I put it all back on, and took it for a spin.
NOW IT'S FIXED. And as a bonus i have 'showroom state' suspension now.
Got up to 180kmh just now, solid as rock.

This is just to add to knowledge bank of unusual shiznit.

Milan

iTrader: (5)

Dang, glad you got it fixed, that took a lot of work!